I have two house dogs.

The kids formed a dog pile on the playground.

I saw several dog piles in the park.

The dog-catchers were called to remove the stray dogs from the neighborhood.

I bought some dog-foods from the pet store.

I need to buy some dog-food for my pet.

I bought some dog foods from the pet store.

I saw a group of puppy-dogs playing in the park.

The dog walked in the park.

I saw a cute puppy-dog at the park.